U.S. patent application number 15/234900 was filed with the patent office on 2018-02-15 for electronic apparatus and single-layer multi-point mutual capacitive touch screen thereof.
This patent application is currently assigned to FOCALTECH SYSTEMS CO., LTD.. The applicant listed for this patent is FOCALTECH SYSTEMS CO., LTD.. Invention is credited to Chao CHEN, Weijing HOU, Hui LIU.
Application Number | 20180046276 15/234900 |
Document ID | / |
Family ID | 61158927 |
Filed Date | 2018-02-15 |
United States Patent
Application |
20180046276 |
Kind Code |
A1 |
HOU; Weijing ; et
al. |
February 15, 2018 |
ELECTRONIC APPARATUS AND SINGLE-LAYER MULTI-POINT MUTUAL CAPACITIVE
TOUCH SCREEN THEREOF
Abstract
An electronic apparatus and a single-layer multi-point mutual
capacitive touch screen thereof are disclosed. The single-layer
multi-point mutual capacitive touch screen includes: multiple
sensing electrode groups, where each sensing electrode group
includes a first electrode unit and a second electrode unit
extending in the second direction, the first electrode unit
includes multiple first electrodes arranged in the second
direction, the second electrode unit includes at least one second
electrode; multiple bonding pads arranged in the first direction,
where first electrodes and second electrodes of the multiple
sensing electrode groups are respectively connected to
corresponding bonding pads; multiple first lines configured to
connect the first electrodes to corresponding bonding pads; and
multiple second lines configured to connect the second electrodes
to corresponding bonding pads, where for a same first electrode
unit, a first electrode is partially arranged opposite to an
adjacent electrode in the first direction.
Inventors: |
HOU; Weijing; (Shenzhen,
CN) ; LIU; Hui; (Shenzhen, CN) ; CHEN;
Chao; (Shenzhen, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
FOCALTECH SYSTEMS CO., LTD. |
Hsinchu |
|
TW |
|
|
Assignee: |
FOCALTECH SYSTEMS CO., LTD.
Hsinchu
TW
|
Family ID: |
61158927 |
Appl. No.: |
15/234900 |
Filed: |
August 11, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06F 3/04166 20190501;
G06F 3/044 20130101; G06F 3/0416 20130101; G06F 3/0443
20190501 |
International
Class: |
G06F 3/044 20060101
G06F003/044 |
Claims
1. A single-layer multi-point mutual capacitive touch screen,
comprising: m sensing electrode groups arranged along a first
direction, where m is a positive integer greater than 1, each of
the m sensing electrode groups comprises a first electrode unit
extending in a second direction and a second electrode unit
extending in the second direction, the first electrode unit and the
second electrode unit are arranged opposite to each other in the
first direction, the second direction is perpendicular to the first
direction, the first electrode unit comprises first to n-th first
electrodes arranged along the second direction, wherein n is a
positive integer greater than 1, and the second electrode unit
comprises a plurality of second electrodes; a plurality of bonding
pads arranged along the first direction, wherein the plurality of
bonding pads are disposed at a first end of the m sensing electrode
groups, first electrodes and second electrodes of the m sensing
electrode groups are respectively connected to corresponding
bonding pads; a plurality of first lines, configured to connect the
first electrodes to the bonding pads corresponding to the first
electrodes; and a plurality of second lines, configured to connect
the second electrodes to the bonding pads corresponding to the
second electrodes, wherein the first electrodes are configured to
function as touch sensing electrodes and the second electrodes are
configured to function as touch driving electrodes, or the first
electrodes are configured to function as touch driving electrodes
and the second electrodes are configured to function as touch
sensing electrodes, and for a same first electrode unit, a first
electrode is partially arranged opposite to an adjacent first
electrode in the first direction.
2. The single-layer multi-point mutual capacitive touch screen
according to claim 1, wherein the second electrode unit comprises
first second electrode to k-th second electrode arranged along the
second direction, wherein k is a positive integer greater than 1;
for an i-th second electrode, in the first direction, the i-th
second electrode is partially arranged opposite to an i-th first
electrode and partially arranged opposite to an (i+1)-th first
electrode, wherein i is a positive integer smaller than k.
3. The single-layer multi-point mutual capacitive touch screen
according to claim 2, wherein in a same second electrode unit, for
at least part of the k second electrodes, each second electrode is
arranged opposite to an adjacent second electrode in the first
direction.
4. The single-layer multi-point mutual capacitive touch screen
according to claim 2, wherein in a same sensing electrode group, in
the first direction, in a case that k=n-1, a k-th second electrode
is partially arranged opposite to a (n-1)-th first electrode and
partially arranged opposite to a n-th first electrode; and in a
case that k=n, an entire k-th second electrode is arranged opposite
to a portion of the n-th first electrode.
5. The single-layer multi-point mutual capacitive touch screen
according to claim 1, wherein the first end is in proximity to
first ones of first electrodes of the m sensing electrode
groups.
6. The single-layer multi-point mutual capacitive touch screen
according to claim 1, wherein every two of the plurality of first
lines does not intersect with each other, every two of the
plurality of second lines does not intersect with each other, and
each of the plurality of first lines and each of the plurality of
second lines does not intersect with each other.
7. The single-layer multi-point mutual capacitive touch screen
according to claim 1, wherein m is an even number, and in every two
adjacent sensing electrode groups of the m sensing electrode
groups, the first electrode unit of one sensing electrode group is
adjacent to the first electrode unit of the other sensing electrode
group, or the second electrode unit of one sensing electrode group
is adjacent to the second electrode unit of the other sensing
electrode group, wherein every two adjacent sensing electrode
groups are arranged in mirror symmetry.
8. The single-layer multi-point mutual capacitive touch screen
according to claim 7, wherein in two adjacent sensing electrode
groups in which the first electrode unit of one sensing electrode
group is adjacent to the first electrode unit of the other sensing
electrode group, last ones of first electrodes of two first
electrode units of the two adjacent sensing electrode groups are
connected to a same bonding pad through a same first line; and the
other first electrodes of the two first electrode units of the two
adjacent sensing electrode groups are connected to corresponding
bonding pads through respective first lines, wherein all first
lines corresponding to first electrodes of the two adjacent sensing
electrode groups are connected from the first electrodes to
corresponding bonding pads along a direction opposite to the second
direction.
9. The single-layer multi-point mutual capacitive touch screen
according to claim 7, wherein in two adjacent sensing electrode
groups in which the second electrode unit of one sensing electrode
group is adjacent to the second electrode unit of the other sensing
electrode group, second electrodes of two second electrode units of
the two adjacent sensing electrode groups are connected to
corresponding bonding pads through respective second lines, wherein
all second lines corresponding to second electrodes of the two
adjacent sensing electrode groups are connected from the second
electrodes to corresponding bonding pads along a direction opposite
to the second direction.
10. The single-layer multi-point mutual capacitive touch screen
according to claim 7, wherein in two adjacent sensing electrode
groups in which the first electrode unit of one sensing electrode
group is adjacent to the first electrode unit of the other sensing
electrode group, each of two first electrode units comprises a
first part of first electrodes and a second part of first
electrodes along the second direction; along the second direction,
last ones of first electrodes of two first parts are connected to a
corresponding bonding pad through a same first line, and the other
first electrodes of the two first parts are connected to
corresponding bonding pads through respective first lines, wherein
first lines corresponding to first electrodes of the two first
parts are connected from the first electrodes to corresponding
bonding pads along a direction opposite to the second direction;
and along the second direction, first ones of first electrodes of
two second parts are connected to a corresponding binding pad
through a same first line, and the other first electrodes of the
two second parts are connected to corresponding bonding pads
through respective first lines, wherein the first lines
corresponding to first electrodes of the two second parts are
connected, along the second direction, from the first electrodes to
via holes disposed at a second end of the m sensing electrode
groups, and are connected to the corresponding bonding pads through
jumper wires connected to the via holes, wherein the second end is
arranged opposite to the first end, and the jumper wires are
connected to respective bonding pads.
11. The single-layer multi-point mutual capacitive touch screen
according to claim 10, wherein the first lines corresponding to the
first electrodes of the two first parts are connected to
corresponding via holes disposed at the first end, and are
connected to the corresponding bonding pads through jumper wires
connected to the via holes.
12. The single-layer multi-point mutual capacitive touch screen
according to claim 11, wherein in the two adjacent sensing
electrode groups, for the first electrodes connected to
corresponding bonding pads through jumper wires and via holes,
along the second direction, first lines of two first electrodes
having a same position in an order of first electrodes are
connected to a corresponding bonding pad through a same jumper
wire, wherein the first lines are connected to the jumper wire
through a via hole.
13. The single-layer multi-point mutual capacitive touch screen
according to claim 7, wherein in the two adjacent sensing electrode
groups in which the second electrode unit of one sensing electrode
group is adjacent to the second electrode unit of the other sensing
electrode group, each of two second electrode units comprise a
first part of second electrodes and a second part of second
electrodes along the second direction; second electrodes of two
first parts are connected to corresponding bonding pads through
respective second lines, wherein second lines corresponding to
second electrodes of the two first parts are connected from the
second electrodes to corresponding bonding pads along a direction
opposite to the second direction; and second electrodes of two
second parts are connected to corresponding bonding pads through
respective second lines, wherein second lines corresponding to
second electrodes of the two second parts are connected from the
second electrodes to via holes disposed at the second end of the m
sensing electrode groups along the second direction, and are
connected to the corresponding bonding pads through jumper wires
connected to the via holes, wherein the second end is arranged
opposite to the first end, and the jumper wires are connected to
respective bonding pads.
14. The single-layer multi-point mutual capacitive touch screen
according to claim 13, wherein the second lines corresponding to
the second electrodes of the two first parts are connected to
corresponding via holes disposed at the first end, and are
connected to the corresponding bonding pads through jumper wires
connected to the via holes.
15. The single-layer multi-point mutual capacitive touch screen
according to claim 14, wherein in the two adjacent sensing
electrode groups, for the second electrodes connected to
corresponding bonding pads through jumper wires and via holes,
odd-numbered second electrodes are connected through a same jumper
wire, and even-numbered second electrodes are connected to a same
jumper wire.
16. The single-layer multi-point mutual capacitive touch screen
according to claim 7, wherein one of the first electrode unit and
the second electrode unit is defined as a first type of electrode
unit, and the other one of the first electrode unit and the second
electrode unit is defined as a second type of electrode unit; lines
of electrodes of electrode units of the first type are connected to
corresponding bonding pads along a direction opposite to the second
direction; and lines of electrodes of electrode units of the second
type are connected to corresponding via holes disposed at a second
end of the m sensing electrode groups along the second direction,
and are connected to corresponding bonding pads through jumper
wires connected to the via holes, wherein the second end is
arranged opposite to the first end, and the jumper wires are
connected to respective bonding pads.
17. The single-layer multi-point mutual capacitive touch screen
according to claim 16, wherein the lines of the electrodes of the
electrode units of the first type are connected to via holes
disposed at the first end, and are connected to the corresponding
bonding pads through jumper wires connected to the via holes.
18. The single-layer multi-point mutual capacitive touch screen
according to claim 1, wherein the first electrode comprises: a
first comb electrode and a second comb electrode which are
partially arranged opposite to each other along the first
direction, wherein each of the first comb electrode and the second
comb electrode comprises a plurality of first branch electrodes,
wherein the plurality of first branch electrodes of the first comb
electrode extends in the first direction, the plurality of first
branch electrodes of the second comb electrode extends in the
direction opposite to the first direction; the first comb electrode
is electrically connected to the second comb electrode; and for the
opposite portion of the first comb electrode and the opposite
portion of the second comb electrode in the first direction, first
branch electrodes of the first comb electrode have a one-to-one
correspondence with first branch electrodes of the second comb
electrode.
19. The single-layer multi-point mutual capacitive touch screen
according to claim 18, wherein in a same first electrode unit, the
first comb electrode and the second comb electrode of the first one
of first electrodes have different lengths in the second direction,
the first comb electrode and the second comb electrode of an n-th
first electrode have different lengths in the second direction, and
the first comb electrode and the second comb electrode of each of
the other first electrodes have a same length in the second
direction.
20. The single-layer multi-point mutual capacitive touch screen
according to claim 19, wherein the second electrode comprises a
plurality of second branch electrodes, wherein the plurality of
second branch electrodes are arranged between the first comb
electrode and the second comb electrode, and each of the plurality
of second branch electrodes comprises a first branch element
extending in the direction opposite to the first direction and a
second branch element extending in the first direction, wherein the
first branch element is arranged between and coupled with two
corresponding first branch electrodes of the first comb electrode,
and the second branch element is arranged between and coupled with
two corresponding first branch electrodes of the second comb
electrode.
21. The single-layer multi-point mutual capacitive touch screen
according to claim 19, wherein for the first one of first
electrodes, along the second direction, the first one of first
branch electrodes of the first comb electrode is electrically
connected to the first one of first branch electrodes of the second
comb electrode.
22. The single-layer multi-point mutual capacitive touch screen
according to claim 21, wherein for the n-th first electrode, along
the second direction, a last one of first branch electrode of the
first comb electrode is electrically connected to a last one of
first branch electrode of the second comb electrode; and for a p-th
first electrode, one of the plurality of first branch electrodes of
the first comb electrode is electrically connected to one of the
plurality of first branch electrode of the second comb electrode,
and the two electrically connected first branch electrodes are
arranged opposite to each other in the first direction, wherein p
is a positive integer greater than 1 and less than n.
23. The single-layer multi-point mutual capacitive touch screen
according to claim 21, wherein for a q-th first electrode, one of
the plurality of first branch electrodes of the first comb
electrode is electrically connected to one of the plurality of
first branch electrodes of the second comb electrode, and the two
electrically connected first branch electrodes are staggered in the
first direction, wherein q is a positive integer greater than 1 and
smaller than n.
24. The single-layer multi-point mutual capacitive touch screen
according to claim 1, wherein the m sensing electrode groups have a
same structure and are arranged in an array.
25. An electronic apparatus, comprising a single-layer multi-point
mutual capacitive touch screen, which comprises: m sensing
electrode groups arranged along a first direction, where m is a
positive integer greater than 1, each of the m sensing electrode
groups comprises a first electrode unit extending in a second
direction and a second electrode unit extending in the second
direction, the first electrode unit and the second electrode unit
are arranged opposite to each other in the first direction, the
second direction is perpendicular to the first direction, the first
electrode unit comprises first to n-th first electrodes arranged
along the second direction, wherein n is a positive integer greater
than 1, and the second electrode unit comprises a plurality of
second electrodes; a plurality of bonding pads arranged along the
first direction, wherein the plurality of bonding pads are disposed
at a first end of the m sensing electrode groups, first electrodes
and second electrodes of the m sensing electrode groups are
respectively connected to corresponding bonding pads; a plurality
of first lines, configured to connect the first electrodes to the
bonding pads corresponding to the first electrodes; and a plurality
of second lines, configured to connect the second electrodes to the
bonding pads corresponding to the second electrodes, wherein the
first electrodes are configured to function as touch sensing
electrodes and the second electrodes are configured to function as
touch driving electrodes, or the first electrodes are configured to
function as touch driving electrodes and the second electrodes are
configured to function as touch sensing electrodes, and for a same
first electrode unit, a first electrode is partially arranged
opposite to an adjacent first electrode in the first direction.
26. The electronic apparatus according to claim 25, further
comprising a flexible circuit board and a touch chip, wherein the
touch chip is electrically connected to the single-layer
multi-point mutual capacitive touch screen though the flexible
circuit board, and the flexible circuit board is connected to the
plurality of bonding pads.
27. The electronic apparatus according to claim 25, wherein the
electronic apparatus comprises the touch chip, and the touch chip
comprises a plurality of pins and is configured to transmit a
signal with the m sensing electrode groups through the plurality of
pins, and for each of the m sensing electrode groups, the n first
electrodes are connected to respective pins of the touch chip; and
along the second direction, odd-numbered second electrodes of the
second electrode unit are connected to a same pin of the touch
chip, and even-numbered second electrodes of the second electrode
unit are connected to a same pin of the touch chip wherein the
odd-numbered second electrodes and the even-numbered second
electrodes are connected to different pins.
28. The electronic apparatus according to claim 27, wherein for
different sensing electrode groups, along the second direction, the
first electrodes of first electrode units with respect to a same
position in an order of first electrodes are connected to a same
pin of the touch chip, and second electrodes of second electrode
units with respect to a same position in an order of second
electrodes are connected to different pins of the touch chip.
29. The electronic apparatus according to claim 27, wherein second
electrodes of different sensing electrode groups are connected to
different pins of the touch chip.
Description
FIELD
[0001] The disclosure relates to the field of touch technology, and
particularly to an electronic apparatus and a single-layer
multi-point mutual capacitive touch screen thereof.
BACKGROUND
[0002] Currently, capacitive touch screens, as important components
for human-machine interaction, have been widely used in electronic
products such as cell phones and tablet computer. A single-layer
touch screen has a low cost and a high price/performance ratio
since only one layer of electrodes needs to be fabricated, and thus
receives broad attention and became an important develop direction
of capacitive touch screens.
[0003] FIG. 1 shows an electrode pattern of a conventional
single-layer mutual capacitive touch screen, which includes 4 first
electrodes X1 to X4 parallelly arranged in the X direction, each
first electrode is coupled to 15 second electrodes Y1 to Y15
sequentially arranged in the Y direction which forms multiple
capacitive sensing nodes 12. Each first electrode is connected to a
respective bonding pad 13 through a respective first line 14, and
each second electrode is connected to a respective bonding pad 13
through a respective second line 15. The bonding pad 13 is
connected to a flexible printed circuit board (FPC), not shown in
the drawings, and the FPC is connected to a touch chip (not shown
in the drawings). The touch chip is configured to detect Touch
position information of a user is determined by detecting
capacitance variations of the capacitive sensing nodes 12 by the
touch chip. The bonding pad 13 is arranged within a binding region
11. The first line 14 and the second line 15 are lines of the
single-layer mutual capacitive touch screen.
[0004] For a single-layer mutual capacitive touch screen with a set
dimension, the electrode pattern with the arrangement shown in FIG.
1 causes a wide line dead region L0 of the single-layer mutual
capacitive touch screen thereby causing a poor touch accuracy. In
addition, the electrode pattern with the arrangement shown in FIG.
1 causes a large number of bonding pads and lines of the
single-layer mutual capacitive touch screen thereby causing a high
fabrication cost.
SUMMARY
[0005] In order to address the above problem, an electronic
apparatus and a single-layer multi-point mutual capacitive touch
screen thereof are provided according to the disclosure, which
improves the touch accuracy of the single-layer multi-point mutual
capacitive touch screen and reduces the fabrication cost.
[0006] To achieve the above object, a single-layer multi-point
mutual capacitive touch screen is provided according to the
disclosure, which includes:
[0007] m sensing electrode groups arranged along a first direction,
where m is a positive integer greater than 1, each of the m sensing
electrode groups includes a first electrode unit extending in a
second direction and a second electrode unit extending in the
second direction, the first electrode unit and the second electrode
unit are arranged opposite to each other in the first direction,
the second direction is perpendicular to the first direction, the
first electrode unit includes first to n-th first electrodes along
the second direction, where n is a positive integer greater than 1,
and the second electrode unit includes multiple second
electrodes;
[0008] multiple bonding pads arranged along the first direction,
where the multiple bonding pads are disposed at a first end of the
m sensing electrode groups, first electrodes and second electrodes
of the m sensing electrode groups are respectively connected to
corresponding bonding pads;
[0009] multiple first lines configured to connect the first
electrodes to the bonding pads corresponding to the first
electrodes; and
[0010] multiple second lines configured to connect the second
electrodes to the bonding pads corresponding to the second
electrodes,
[0011] where the first electrodes are configured to function as
touch sensing electrodes and the second electrodes are configured
to function as touch driving electrodes, or the first electrodes
are configured to function as touch driving electrodes and the
second electrodes are configured to function as touch sensing
electrodes, and for a same first electrode unit, a first electrode
is partially arranged opposite to an adjacent first electrode in
the first direction.
[0012] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, the second electrode unit includes first
second electrode to k-th second electrode arranged along the second
direction, where k is a positive integer greater than 1;
[0013] for an i-th second electrode, in the first direction, the
i-th second electrode is partially arranged opposite to an i-th
first electrode and partially arranged opposite to an i+1th first
electrode, where i is a positive integer smaller than k.
[0014] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in a same second electrode unit, for at
least part of the k second electrodes, each second electrode is
arranged opposite to an adjacent second electrode in the first
direction.
[0015] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in a same sensing electrode group, in the
first direction,
[0016] in a case that k=n-1, a k-th second electrode is partially
arranged opposite to a (n-1)th first electrode and partially
arranged opposite to a n-th first electrode; and
[0017] in a case that k=n, an entire k-th second electrode is
arranged opposite to a portion of the n-th first electrode.
[0018] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, the first end is in proximity to first
ones of first electrodes of the m sensing electrode groups.
[0019] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, every two of the multiple first lines does
not intersect with each other, every two the of the multiple second
lines does not intersect with each other, and each of the multiple
first lines and each of the multiple second lines does not
intersect with each other.
[0020] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, m is an even number, and in every two
adjacent sensing electrode groups of the m sensing electrode
groups, the first electrode unit of one sensing electrode group is
adjacent to the first electrode unit of the other sensing electrode
group, or the second electrode unit of one sensing electrode group
is adjacent to the second electrode unit of the other sensing
electrode group, where every two adjacent sensing electrode groups
are arranged in mirror symmetry.
[0021] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in two adjacent sensing electrode groups
in which the first electrode unit of one sensing electrode group is
adjacent to the first electrode unit of the other sensing electrode
group,
[0022] last ones of first electrodes of two first electrode units
of the two adjacent sensing electrode groups are connected to a
same bonding pad through a same first line; and the other first
electrodes of the two first electrode units of the two adjacent
sensing electrode groups are connected to corresponding bonding
pads through respective first lines,
[0023] where all first lines corresponding to first electrodes of
the two adjacent sensing electrode groups are connected from the
first electrodes to corresponding bonding pads along a direction
opposite to the second direction.
[0024] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in two adjacent sensing electrode groups
in which the second electrode unit of one sensing electrode group
is adjacent to the second electrode unit of the other sensing
electrode group,
[0025] second electrodes of two second electrode units of the two
adjacent sensing electrode groups are connected to corresponding
bonding pads through respective second lines,
[0026] where all second lines corresponding to second electrodes of
the two adjacent sensing electrode groups are connected from the
second electrodes to corresponding bonding pads along a direction
opposite to the second direction.
[0027] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in two adjacent sensing electrode groups
in which the first electrode unit of one sensing electrode group is
adjacent to the first electrode unit of the other sensing electrode
group,
[0028] each of two first electrode units includes a first part of
first electrodes and a second part of first electrodes along the
second direction;
[0029] along the second direction, last ones of first electrodes of
two first parts are connected to a corresponding bonding pad
through a same first line, and the other first electrodes of the
two first parts are connected to corresponding bonding pads through
respective first lines, where first lines corresponding to first
electrodes of the two first parts are connected from the first
electrodes to corresponding bonding pads along a direction opposite
to the second direction; and
[0030] along the second direction, first ones of first electrodes
of two second parts are connected to a corresponding binding pad
through a same first line, and the other first electrodes of the
two second parts are connected to corresponding bonding pads
through respective first lines, where the first lines corresponding
to first electrodes of the two second parts are connected, along
the second direction, from the first electrodes to via holes
disposed at a second end of the m sensing electrode groups, and are
connected to the corresponding bonding pads through jumper wires
connected to the via holes, where the second end is arranged
opposite to the first end, and the jumper wires are connected to
respective bonding pads.
[0031] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, the first lines corresponding to the first
electrodes of the two first parts are connected to corresponding
via holes disposed at the first end, and are connected to the
corresponding bonding pads through jumper wires connected to the
via holes.
[0032] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in the two adjacent sensing electrode
groups, for the first electrodes connected to corresponding bonding
pads through jumper wires and via holes, along the second
direction, first lines of two first electrodes having a same
position in an order of first electrodes are connected to a
corresponding bonding pad through a same jumper wire, where the
first lines are connected to the jumper wire through a via
hole.
[0033] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in the two adjacent sensing electrode
groups in which the second electrode unit of one sensing electrode
group is adjacent to the second electrode unit of the other sensing
electrode group,
[0034] each of two second electrode units include a first part of
second electrodes and a second part of second electrodes along the
second direction;
[0035] second electrodes of two first parts are connected to
corresponding bonding pads through respective second lines, where
second lines corresponding to second electrodes of the two first
parts are connected from the second electrodes to corresponding
bonding pads along a direction opposite to the second direction;
and
[0036] second electrodes of two second parts are connected to
corresponding bonding pads through respective second lines, where
second lines corresponding to second electrodes of the two second
parts are connected from the second electrodes to via holes
disposed at the second end of the m sensing electrode groups along
the second direction, and are connected to the corresponding
bonding pads through jumper wires connected to the via holes, where
the second end is arranged opposite to the first end, and the
jumper wires are connected to respective bonding pads.
[0037] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, the second lines corresponding to the
second electrodes of the two first parts are connected to
corresponding via holes disposed at the first end, and are
connected to the corresponding bonding pads through jumper wires
connected to the via holes.
[0038] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in the two adjacent sensing electrode
groups, for the second electrodes connected to corresponding
bonding pads through jumper wires and via holes, odd-numbered
second electrodes are connected to a same jumper wire, and
even-numbered second electrodes are connected to a same jumper
wire.
[0039] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, one of the first electrode unit and the
second electrode unit is defined as a first type of electrode unit,
and the other one of the first electrode unit and the second
electrode unit is defined as a second type of electrode unit;
[0040] lines of electrodes of electrode units of the first type are
connected to corresponding bonding pads along a direction opposite
to the second direction; and
[0041] lines of electrodes of electrode units of the second type
are connected to corresponding via holes disposed at the second end
of the m sensing electrode groups along the second direction, and
are connected to corresponding bonding pads through jumper wires
connected to the via holes, where the second end is arranged
opposite to the first end, and the jumper wires are connected to
respective bonding pads.
[0042] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, the lines of the electrodes of the
electrode units of the first type are connected to via holes
disposed at the first end, and are connected to the corresponding
bonding pads through jumper wires connected to the via holes.
[0043] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, the first electrode includes: a first comb
electrode and a second comb electrode which are partially arranged
opposite to each other along the first direction, where
[0044] each of the first comb electrode and the second comb
electrode includes multiple first branch electrodes, where the
multiple first branch electrodes of the first comb electrode
extends in the first direction, the multiple first branch
electrodes of the second comb electrode extends in the direction
opposite to the first direction; the first comb electrode is
electrically connected to the second comb electrode; and for the
opposite portion of the first comb electrode and the opposite
portion of the second comb electrode in the first direction, first
branch electrodes of the first comb electrode have a one-to-one
correspondence with first branch electrodes of the second comb
electrode.
[0045] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, in a same first electrode unit, the first
comb electrode and the second comb electrode of the first one of
first electrodes have different lengths in the second direction,
the first comb electrode and the second comb electrode of an n-th
first electrode have different lengths in the second direction, and
the first comb electrode and the second comb electrode of each of
the other first electrodes have a same length in the second
direction.
[0046] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, the second electrode includes multiple
second branch electrodes, where the multiple second branch
electrodes are arranged between the first comb electrode and the
second comb electrode, and
[0047] each of the multiple second branch electrodes includes a
first branch element extending in the direction opposite to the
first direction and a second branch element extending in the first
direction, where
[0048] the first branch element is arranged between and coupled
with two corresponding first branch electrodes of the first comb
electrode, and
[0049] the second branch element is arranged between and coupled
with two corresponding first branch electrodes of the second comb
electrode.
[0050] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, for the first one of first electrodes in
each first electrode unit, along the second direction, the first
one of first branch electrodes of the first comb electrode is
electrically connected to the first one of first branch electrodes
of the second comb electrode.
[0051] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, for the n-th first electrode, along the
second direction, the last one of first branch electrodes of the
first comb electrode is electrically connected to the last one of
first branch electrodes of the second comb electrode; and
[0052] for a p-th first electrode, one of the multiple first branch
electrodes of the first comb electrode is electrically connected to
one of the multiple first branch electrode of the second comb
electrode, and the two electrically connected first branch
electrodes are arranged opposite to each other in the first
direction, where p is a positive integer greater than 1 and less
than n.
[0053] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, for a q-th first electrode, one of the
multiple first branch electrodes of the first comb electrode is
electrically connected to one of the multiple first branch
electrodes of the second comb electrode, and the two electrically
connected first branch electrodes are staggered in the first
direction, where q is a positive integer greater than 1 and smaller
than n.
[0054] Preferably, in the above single-layer multi-point mutual
capacitive touch screen, the m sensing electrode groups have a same
structure and are arranged in an array.
[0055] An electronic apparatus is further provided according to the
disclosure, which includes the single-layer multi-point mutual
capacitive touch screen according to any one of the above
arrangements.
[0056] Preferably, the electronic apparatus further includes a
flexible circuit board and a touch chip, where the touch chip is
electrically connected to the single-layer multi-point mutual
capacitive touch screen though the flexible circuit board, and the
flexible circuit board is connected to the multiple bonding
pads.
[0057] Preferably, in the above electronic apparatus, the
electronic apparatus includes the touch chip, and the touch chip
includes multiple pins and is configured to transmit a signal with
the m sensing electrode groups through the multiple pins, and for
each of the m sensing electrode groups,
[0058] the n first electrodes are connected to respective pins of
the touch chip; and
[0059] along the second direction, odd-numbered second electrodes
of the second electrode unit are connected to a same pin of the
touch chip, and even-numbered second electrodes of the second
electrode unit are connected to a same pin of the touch chip, where
the odd-numbered second electrodes and the even-numbered second
electrodes are connected to different pins.
[0060] Preferably, in the above electronic apparatus, for different
sensing electrode groups,
[0061] along the second direction, the first electrodes of first
electrode units with respect to a same position in an order of
first electrodes are connected to a same pin of the touch chip, and
second electrodes of second electrode units with respect to a same
position in an order of second electrodes are connected to
different pins of the touch chip.
[0062] Preferably, in the above electronic apparatus, second
electrodes of different sensing electrode groups may be connected
to different pins of the touch chip.
[0063] As can be seen from the above description, the single-layer
multi-point mutual capacitive touch screen according to the
disclosure includes: m sensing electrode groups arranged in a first
direction, where m is a positive integer greater than 1, each of
the m sensing electrode groups includes a first electrode unit
extending in a second direction and a second electrode unit
extending in the second direction, the first electrode unit and the
second electrode unit are arranged opposite to each other in the
first direction, the second direction is perpendicular to the first
direction, the first electrode unit includes first to n-th first
electrodes arranged along the second direction, where n is a
positive integer greater than 1, and the second electrode unit
includes at least one second electrode; multiple bonding pads
arranged along the first direction, where the multiple bonding pads
are disposed at a first end of the m sensing electrode groups,
first electrodes and second electrodes of the m sensing electrode
groups are respectively connected to corresponding bonding pads;
multiple first lines, where the multiple first lines are configured
to connect the first electrodes to bonding pads corresponding to
the first electrodes; and multiple second lines, where the multiple
second lines are configured to connect the second electrodes to
bonding pads corresponding to the second electrodes, where the
first electrodes are configured to function as touch sensing
electrodes and the second electrodes are configured to function as
touch driving electrodes, or the first electrodes are configured to
function as touch driving electrodes and the second electrodes are
configured to function as touch sensing electrodes, and in a same
first electrode unit, adjacent first electrodes are partially
arranged opposite to each other in the first direction.
[0064] Two adjacent first electrodes of a same first electrode unit
are partially arranged opposite to each other in the first
direction, thus in the two adjacent first electrodes of a same
first electrode unit, non-opposite portions of the two adjacent
first electrodes in the first direction can form sensing nodes with
corresponding second electrodes respectively, and opposite portions
of the two adjacent first electrodes in the first direction can
also form a sensing node with a corresponding second electrode,
therefore the number of sensing nodes is increased and the touch
accuracy is improved. According to the disclosure, the number of
sensing nodes is increased by arranging opposite portions between
two adjacent first electrodes, which can reduce the number of first
electrodes and second electrodes, thus the number of lines and
bonding pads are reduces, the width of the line dead region is
reduced, while the fabrication cost is reduced and the touch
accuracy is improved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0065] To illustrate technical solutions according to embodiments
of the disclosure or in the conventional technology more clearly,
the following briefly describes the drawings according to
embodiments of the disclosure. Apparently, the drawings are only
some embodiments of the present disclosure, and other drawings may
be obtained by those skilled in the art according to those drawings
without creative efforts.
[0066] FIG. 1 is a schematic diagram showing a topological
structure of a conventional single-layer mutual capacitive touch
screen;
[0067] FIG. 2 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to an embodiment of the disclosure;
[0068] FIG. 3 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure;
[0069] FIG. 4a is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure;
[0070] FIG. 4b is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure;
[0071] FIG. 4c is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure;
[0072] FIG. 4d is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure;
[0073] FIG. 5a is a schematic diagram showing a specific structure
of one sensing electrode group of the single-layer multi-point
mutual capacitive touch screen shown in FIG. 2 according to a
preferable embodiment of the disclosure;
[0074] FIG. 5b is a schematic diagram showing a specific structure
of the multiple sensing electrode groups of the single-layer
multi-point mutual capacitive touch screen shown in FIG. 2
according to a preferable embodiment of the disclosure;
[0075] FIG. 5c is a schematic diagram showing a structure of
multiple sensing electrode groups of the single-layer multi-point
mutual capacitive touch screen according to another preferable
embodiment of the disclosure;
[0076] FIG. 6a is a schematic diagram showing a specific structure
of one sensing electrode group of the single-layer multi-point
mutual capacitive touch screen shown in FIG. 3 according to a
preferable embodiment of the disclosure;
[0077] FIG. 6b is a schematic diagram showing a specific structure
of the multiple sensing electrode groups of the single-layer
multi-point mutual capacitive touch screen shown in FIG. 3
according to a preferable embodiment;
[0078] FIG. 6c is a schematic diagram showing a structure of the
multiple sensing electrode groups of the single-layer multi-point
mutual capacitive touch screen according to another preferable
embodiment of the disclosure;
[0079] FIG. 7 is a schematic diagram showing a topological
structure of a conventional single-layer multi-point mutual
capacitive touch screen;
[0080] FIG. 8 is a schematic diagram showing a topological
structure of another conventional single-layer multi-point mutual
capacitive touch screen;
[0081] FIG. 9 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure;
[0082] FIG. 10 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure;
[0083] FIG. 11 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure;
[0084] FIG. 12 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure; and
[0085] FIG. 13 is a schematic structural diagram of an electronic
apparatus according to an embodiment of the disclosure.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0086] The technical solutions of embodiments of the disclosure
will be illustrated clearly and completely in conjunction with the
drawings of the embodiments of the disclosure. Apparently, the
described embodiments are only a few embodiments rather than all
embodiments of the disclosure. Any other embodiments obtained by
those skilled in the art on the basis of the embodiments of the
present disclosure without creative work will fall within the scope
of the present disclosure.
[0087] It should be noted that, in the content below, the term
"multiple" has a meaning of at least two.
[0088] A single-layer multi-point mutual capacitive touch screen is
provided according to an embodiment of the disclosure. Reference is
made to FIG. 2, which is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to an embodiment of the disclosure. The
single-layer multi-point mutual capacitive touch screen includes
multiple sensing electrode groups 27, multiple bonding pads 23,
multiple first lines 26 and multiple second lines 25.
[0089] The multiple sensing electrode groups 27 includes first to
m-th sensing electrode groups 27 arranged along a first direction
(the direction of the X-axis), where m is a positive integer
greater than 1. FIG. 2, in which m equal to 4 is taken as an
example for illustration, shows a first sensing electrode group 27
to a fourth sensing electrode group 27.
[0090] Each of the sensing electrode groups 27 includes a first
electrode unit 21 extending in a second direction (the direction of
the Y-axis) and a second electrode unit 22 extending in the second
direction, where the first electrode unit 21 and the second
electrode unit 22 are oppositely arranged in the first direction to
form capacitive sensing nodes 24 and 28. A capacitance variation of
each capacitive sensing node 24 is detected with a touch chip (not
shown in the drawings) to determine touch position information of a
user. The second direction is perpendicular to the first
direction.
[0091] The first electrode unit 21 includes n first electrodes
arranged along the second direction, where n is a positive integer
greater than 1. FIG. 2, in which n equal to 7 is taken as an
example for illustration, shows first to seventh first electrodes.
The second electrode unit 22 includes multiple second electrodes
arranged in the second direction.
[0092] The multiple bonding pads 23 are arranged in the first
direction and disposed at a first end of the m sensing electrode
groups 27, where first electrodes and second electrodes of the m
sensing electrode groups 27 are respectively connected to
corresponding bonding pads 23. The first end is in proximity to a
first one of the n first electrodes of the m sensing electrode
groups 27. That is, as shown in FIG. 2, an upper end of the
single-layer multi-point mutual capacitive touch screen is the
first end, and a lower end of the single-layer multi-point mutual
capacitive touch screen is the second end. A direction of a line
connecting the first end and the second end is the second
direction.
[0093] The first line 26 is configured to connect the first
electrode to a corresponding bonding pad 23, and the second line 25
is configured to connect the second electrode to a corresponding
bonding pad 23.
[0094] The first electrodes are configured to function as touch
sensing electrodes and the second electrodes are configured to
function as touch driving electrodes. Alternatively, the first
electrodes are configured to function as touch driving electrodes
and the second electrodes are configured to function as touch
sensing electrodes. In a same first electrode unit 21, each first
electrode is partially arranged opposite to an adjacent electrode
in the first direction.
[0095] Since two adjacent first electrodes in a same first
electrode unit 21 are partially arranged opposite to each other in
the first direction, non-opposite portions of the two adjacent
first electrodes in the first direction can form capacitive sensing
nodes 24 with a corresponding second electrode. Each of the
capacitive sensing nodes 24 include a single coupling capacitance
between the first electrode and the second electrode, which is
changed when the non-opposite portion is touched. Furthermore, the
opposite portions of the two adjacent first electrodes in the first
direction can also form a capacitive sensing node 28 with a
corresponding second electrode. Each of the capacitive sensing node
28 includes a composite coupling capacitance of two coupling
capacitances between the opposite portions of the two adjacent
first electrodes and a same second electrode. The two coupling
capacitances are changed simultaneously when the opposite portions
are touched. Therefore, whether the capacitance sensing node 24 or
the capacitance sensing node 28 is touched can be determined.
Therefore, with the technical solution according to the disclosure,
for a same physical dimension of the electrode, the number and
types of the capacitive sensing nodes are increased, and the touch
accuracy is improved.
[0096] According to the disclosure, the number of capacitive
sensing nodes is increased by arranging opposite portions of first
electrodes, which can reduce the number of first electrodes and
second electrodes, such that the number of lines and bonding pads
23 is decreased, and the width of the line dead zone is reduced,
while the touch accuracy is improved and the fabrication cost is
reduced.
[0097] In FIG. 2, the second electrode unit 22 includes first to
k-th second electrodes along the second direction, where k is a
positive integer greater than 1. The i-th second electrode is
partially arranged opposite to an i-th first electrode and is
partially arranged opposite to an (i+1)-th first electrode in the
first direction, where is a positive integer smaller than k. In a
case that k is equal to n-1, a k-th second electrode is partially
arranged opposite to an (n-1)-th first electrode and is partially
arranged opposite to an n-th first electrode.
[0098] If a single-layer multi-point mutual capacitive touch screen
with a length of 15 pitches is arranged as shown in FIG. 1, each of
the second electrodes has a length of 1 pitch, each of the sensing
electrode groups includes 1 first electrode and 15 second
electrode, 15 capacitive sensing nodes 12 are formed, and 16 lines
are required (1 first line 14 and 15 second lines 15). For all of
the four sensing electrode groups, a total of 60 capacitive sensing
nodes 12 are formed and 64 lines are required. In the disclosure,
the length is a dimension along the second direction, and the pitch
is a predetermined length value.
[0099] If the single-layer multi-point mutual capacitive touch
screen with a length of 15 pitches is arranged as shown in FIG. 2,
it is arranged that each second electrode has a length of 2.5
Pitches, the first to seventh first electrodes each have a length
of 1.5 Pitches, each of the second first electrode to the sixth
first electrode has a length of 3 pitches, and opposite portions of
two adjacent first electrodes in the first direction have a length
of 0.5 pitches. In this case, the total length of the single-layer
multi-point mutual capacitive touch screen is also 15 pitches. Each
sensing electrode group 27 includes 7 first electrodes and 6 second
electrodes, 18 capacitive sensing nodes are formed and 13 lines are
required (7 first lines 26 and 6 second lines 25). For all of the
four sensing electrode groups 27, a total of 72 capacitive sensing
nodes 24 are formed and 52 lines are required. Thus, as compared to
the conventional arrangement shown in FIG. 1, with the arrangement
shown in FIG. 2, the number of capacitive sensing nodes is
increased while the number of lines is decreased, thus the number
of the bonding pads 23 is decreased and the width of the line dead
region L is reduced. Therefore, the cost is reduced and the touch
accuracy is improved. The width is a dimension along the first
direction. Since the width of the line dead region is reduced, more
sensing electrode groups 27 can be arranged in the single-layer
multi-point mutual capacitive touch screen with a set width which
further improves the touch accuracy. Alternatively, instead of
arranging more sensing electrode groups 27, a width of a flexible
printed circuit (FPC) to which the bonding pads 23 of the
single-layer multi-point mutual capacitive touch screen shown in
FIG. 2 is attached is correspondingly reduced, thereby reducing the
fabrication cost of the FPC, thus the cost of an electronic
apparatus 131 (as shown in FIG. 13) including the single-layer
multi-point mutual capacitive touch screen and the FPC is reduced
correspondingly.
[0100] It should be noted that, the sensing electrode groups 27
shown in FIG. 2 are arranged in mirror symmetry. The arrangement of
the sensing electrode groups 27 is not limited to the mirror
symmetry, alternatively, each of the sensing electrode groups 27
may have a same structure, and the sensing electrode groups 27 are
arranged in an array. Preferably, the lines arranged between
adjacent sensing electrode groups 27 have a same type, that is,
lines between adjacent sensing electrode groups 27 may not include
both the first line 26 and the second line 25, thus coupling
interference is reduced.
[0101] Reference is made to FIG. 3, which is a schematic diagram
showing a topological structure of a single-layer multi-point
mutual capacitive touch screen according to another embodiment of
the disclosure. The single-layer multi-point mutual capacitive
touch screen shown in FIG. 3 includes four sensing electrode groups
27, i.e., m=4, and the first electrode unit 21 includes 6 first
electrodes, i.e., n=6. In this case, an entire k-th second
electrode is arranged opposite to an n-th first electrode, where k
is equal to n. In a same second electrode unit 22, for at least
part of adjacent second electrodes of the k second electrodes, each
second electrode is partially arranged opposite to an adjacent
second electrode in the first direction. In a case that a last one
of second electrodes of the second electrode unit along the second
direction has a short length, the last second electrode may be not
opposite to a second electrode adjacent thereto, as shown in FIG.
3.
[0102] It can be seen from FIG. 3, besides the coupling capacitance
24 between a single first electrode and a single second electrode
and the composite coupling capacitance 28 between two adjacent
first electrodes and a same second electrode shown in FIG. 2, a
composite coupling capacitance 29 between two adjacent second
electrodes and a same first electrode is further formed, thus the
number and types of the capacitive sensing nodes are further
increased while the physical dimension of the electrode remains the
same.
[0103] With the arrangement shown in FIG. 3, in each of the sensing
electrode groups 27, it is arranged that the first one of first
electrodes and the last one of first electrodes each have a length
of 1.5 pitches, each of the second first electrode to the fifth
first electrode has a length of 3.5 pitches, and opposite portions
of two adjacent first electrodes in the first direction have a
length of 0.5 pitches; it is arranged that the last second
electrode has a length of 0.5 pitches, and each of the second to
fifth second electrode has a length of 3 pitches and it is arranged
that opposite portions of two adjacent second electrodes along the
first direction have a length of 0.5 pitches, and the total length
of the single-layer multi-point mutual capacitive touch screen is
also 15 pitches; and it is arranged that each of the sensing
electrode groups 27 includes 6 first electrodes and 6 second
electrodes, 20 capacitive sensing nodes are formed and 12 lines are
required (6 first lines 26 and 6 second lines 25). For all of the
four sensing electrode groups 27, a total of 80 capacitive sensing
nodes are formed and 48 lines are required. Similarly, as compared
to the conventional arrangement shown in FIG. 1, with the
arrangement shown in FIG. 3, the number of capacitive sensing nodes
is increased while the number of the first lines 26 and the second
lines 25 are decreased, thus the number of the bonding pads 23 is
decreased and the width of the line dead region L is reduced.
Therefore, the cost is reduced and the touch accuracy is
improved.
[0104] The length of opposite portions of two adjacent first
electrodes in the first direction and the length of opposite
portions of two adjacent second electrodes in the first direction
may be arranged within a range of 0 pitch to 1.5 pitches according
to dimension requirements.
[0105] In the embodiments of the disclosure, every two of the
multiple first lines 26 do not intersect with each other, every two
the of the multiple second lines 25 do not intersect with each
other, and each of the multiple first lines 26 does not intersect
with each of the multiple second lines 25, such that the multiple
first lines 26 and the multiple second lines 25 may be arranged in
a same layer, thereby reducing fabrication difficulty and reducing
the thickness of the touch screen.
[0106] Preferably, it is arranged that m is an even number, in
every two adjacent sensing electrode groups 27, the first electrode
unit 21 of one sensing electrode group 27 is adjacent to the first
electrode unit 21 of the other sensing electrode group 27, or the
second electrode unit 22 of one sensing electrode group 27 is
adjacent to the second electrode unit 22 of the other sensing
electrode group 27, where the two adjacent sensing electrode groups
27 are arranged in mirror symmetry, thereby improving linearity and
accuracy of touch sensing.
[0107] In the embodiment, in two adjacent sensing electrode groups
27 in which the first electrode unit 21 of one sensing electrode
group 27 is adjacent to the first electrode unit 21 of the other
sensing electrode group 27, last ones of first electrodes of two
first electrode units 21 of the two adjacent sensing electrode
groups 27 are connected to a same bonding pad 23 through a same
first line 26, and the first electrode to fifth electrode of the
two first electrode units 21 of the two adjacent sensing electrode
groups 27 are connected to corresponding bonding pads 23 through
respective first lines 26, where the first lines 26 of the two
adjacent sensing electrode groups 27 are connected from the first
electrodes to corresponding bonding pads 23 along a direction
opposite to the second direction.
[0108] In two adjacent sensing electrode groups 27 in which the
second electrode unit 22 of one sensing electrode group 27 is
adjacent to the second electrode unit 22 of the other sensing
electrode group 27, second electrodes of two second electrode units
22 of the two adjacent sensing electrode groups 27 are connected to
corresponding bonding pads 23 through respective second lines 25,
where second lines 25 of the second electrodes of the two adjacent
sensing electrode groups 27 are connected from respective second
electrodes to corresponding bonding pads 23 along a direction
opposite to the second direction.
[0109] The width of the line dead region may be further reduced,
and the touch accuracy may be further improved by arranging jumper
wires and via holes.
[0110] In the two adjacent sensing electrode groups 27 in which the
first electrode unit 21 of one sensing electrode group 27 is
adjacent to the first electrode unit 21 of the other sensing
electrode group 27:
[0111] each of the two first electrode units 21 includes a first
part of first electrodes and a second part of first electrodes
along the second direction, where the number of first electrodes of
the first part is the same as the number of first electrodes of the
second part in a case that n is an even number, and the number of
the first electrodes of the first part is smaller than the number
of first electrodes of the second part by one in a case that n is
an odd number, thus facilitating reducing the number of lines;
[0112] in the second direction, last ones of first electrodes of
the two first parts are connected to a corresponding bonding pad 23
through a same first line 26 thereby further reducing the number of
lines and avoiding an intersection between lines, and the other
first electrodes of the two first parts are connected to
corresponding bonding pads 23 through respective first lines 26,
where the first lines 26 corresponding to first electrodes of the
two first parts are connected from the first electrodes to
corresponding bonding pads 23 along a direction opposite to the
second direction; and
[0113] along the second direction, first ones of first electrodes
of the two second part are connected to a corresponding bonding pad
23 through a same first line 26 thereby further reducing the number
of lines and avoiding an intersection between lines, and the other
first electrodes of the two second parts are connected to
corresponding bonding pads 23 through respective first lines 26,
where the first lines 26 corresponding to the first electrodes of
the two second part are connected from the first electrodes to via
holes disposed at a second end of the m sensing electrode groups 27
in the second direction, and are connected to the corresponding
bonding pads 23 through jumper wires connected to the via holes,
where the second end is arranged oppositely to the first end, and
the jumper wires are connected to respective bonding pads 23.
[0114] In the two adjacent sensing electrode groups 27 in which the
second electrode unit 22 of one sensing electrode group 27 is
adjacent to the second electrode unit 22 of the other sensing
electrode group 27,
[0115] each of the two second electrode units 22 includes a first
part of second electrodes and a second part of second electrodes,
where the number of second electrodes of the first part is the same
as the number of second electrodes of the second part in a case
that k is an even number, and the number of the second electrodes
of the first part is smaller than the number of second electrodes
of the second part by one in a case that k is an odd number;
[0116] second electrodes of two first parts are connected to
corresponding bonding pads 23 through respective second lines 25,
where second lines 25 corresponding to second electrodes of the two
first parts are connected from the second electrodes to
corresponding bonding pads 23 along a direction opposite to the
second direction; and
[0117] second electrodes of two second parts are connected to
corresponding bonding pads 23 through respective second lines 25,
where the second lines 25 corresponding to second electrodes of the
two second parts are connected from the second electrodes to via
holes disposed at the second end of the m sensing electrode groups
27 in the second direction, and tare connected to the corresponding
bonding pads 23 through jumper wires connected to the via holes,
where the second end is arranged oppositely to the first end, and
the jumper wires are connected to respective bonding pads 23.
[0118] In the two adjacent sensing electrode groups 27, first lines
26 of two opposite first electrodes of two second parts in the
first direction are connected to a corresponding bonding pad 23
through a same jumper wire, where the first lines are connected to
the jumper wire through a via hole. In the two adjacent sensing
electrode groups 27, for the second electrodes of the second part
of a same second electrode unit 22, odd-numbered second electrodes
are connected to a same jumper wire, and even-numbered second
electrodes are connected to a same jumper wire, such that the
number of lines is reduced, and the fabrication cost is reduced
while it is ensured that that multiple-point touch detection can be
performed.
[0119] It should be noted that, the sensing electrode groups 27
shown in FIG. 3 are arranged in mirror symmetry. The arrangement of
the sensing electrode groups 27 is not limited to the mirror
symmetry, alternatively, each of the sensing electrode groups 27
may have a same structure, and the sensing electrode groups 27 are
arranged in an array. Preferably, the lines between adjacent
sensing electrode groups 27 have a same type. That is, lines
between adjacent sensing electrode groups 27 may not include both
the first lines 26 and the second lines 25, thus coupling
interference is reduced.
[0120] Reference is made to FIG. 4a, which is a schematic diagram
showing a topological structure of a single-layer multi-point
mutual capacitive touch screen according to another embodiment of
the disclosure. In the embodiment shown in FIG. 4a, the width of
the line dead region is further reduced based on the above
arrangement of jumper wires and via holes. The single-layer
multi-point mutual capacitive touch screen includes a display area
and a frame area surrounding the display area. Sensing electrode
groups 27 are disposed in the display area. Bonding pads 23 are
disposed at a first end of the single-layer multi-point mutual
capacitive touch screen. Start ends of jumper wires 41 are arranged
at a second end of the single-layer multi-point mutual capacitive
touch screen, and are connected to corresponding bonding pads 23
through the frame area on the left side or the right side of the
single-layer multi-point mutual capacitive touch screen. The jumper
wires 41 are located above a metal layer where the first lines 26
and the second lines 25 are located, and an insulation layer is
disposed between the jumper wires 41 and the metal layer. The
jumper wires 41 are electrically connected with corresponding lines
through via holes 42 to facilitate an electrical connection between
the lines and corresponding bonding pads 23. bonding pad
[0121] In FIG. 4a, it is arranged that a second electrode unit of a
first sensing electrode group 27 is adjacent to a second electrode
unit of a second sensing electrode group 27, and a first electrode
unit of the second sensing electrode group 27 is adjacent to a
first electrode unit of the third sensing electrode group 27. As
described above, the first electrode unit 21 and the second
electrode unit 22 of each sensing electrode group 27 each include a
first part and a second part. In a case that m=4, n=7 and k=6, for
each of the first electrode units 21, the first part includes the
first to third first electrodes, and the second part includes the
fourth to seventh first electrodes, and for each of the second
electrode units 22, the first part includes the first to third
second electrodes, and the second part includes the fourth to sixth
second electrodes.
[0122] For the second sensing electrode group 27 and the third
sensing electrode group 27,
[0123] in the first parts of the first electrode units, the first
to the third first electrode are connected to corresponding bonding
pad 23 with respective first line 26, where the first lines 26
corresponding to first electrodes of two first part are connected
from the first electrodes to corresponding bonding pads 23 along a
direction opposite to the second direction, preferably, third first
electrodes of the two first parts may be connected to a
corresponding bonding pad 23 through a same first line 26 thereby
reducing the number of lines while avoiding an intersection between
lines;
[0124] in second parts of the first electrode units, the fourth to
the seventh first electrodes are connected to corresponding bonding
pads 23 with respective first lines 26, where the first lines 26
corresponding to the first electrodes of the second parts are
connected from the first electrodes to via holes 42 disposed at the
second end along the second direction, and are connected to the
corresponding bonding pads 23 through jumper wires 41 connected to
the via holes 42, where the jumper wires 41 are connected to
respective bonding pads 23, preferably, fourth first electrodes of
the two first parts may be connected to a corresponding bonding pad
23 through a same first line 26 thereby reducing the number of
lines while avoiding an intersection between lines;
[0125] for the first electrodes of two second parts of the two
first electrode units, first lines 26 corresponding to two opposite
first electrodes in the first direction are connected to a
corresponding bonding pad 23 through a same jumper wire, where the
first lines are connected to the jumper wire through a via hole 42,
thereby reducing the number of bonding pads 23 and jumper wires 41
while achieving touch detection. Specifically, two fourth first
electrodes are connected to a same jumper wire 41 disposed at the
second end through respective first lines 26 so as to be connected
to a same bonding pad 23 through the jumper wire 41; two fifth
first electrodes are connected to a same jumper wire 41 disposed at
the second end through respective first lines 26 so as to be
connected to a same bonding pad 23 through the jumper wire 41, two
sixth first electrodes are connected to a same jumper wire 41
disposed at the second end through respective first lines 26 so as
to be connected to a same bonding pad 23 through the jumper wire
41, and two seventh first electrodes are connected to a same jumper
wire 41 disposed at the second end through respective first lines
26 so as to be connected to a same bonding pad 23 through the
jumper wire 41.
[0126] In the first sensing electrode group 27 and the second
sensing electrode group 27,
[0127] in two first parts of the two second electrode units, the
first to the third second electrodes are connected to corresponding
bonding pads 23 with respective second lines 25, where the second
lines 25 corresponding to the second electrodes of two first parts
are connected from the second electrodes to corresponding bonding
pads 23 along a direction opposite to the second direction,
[0128] in two second parts of the two second electrode units, the
fourth to the sixth second electrodes are connected to
corresponding bonding pads 23 with respective first lines 25, where
the second lines 25 corresponding to second electrodes of the two
second part are connected from the second electrodes to via holes
42 disposed at the second end along the second direction, and are
connected to the corresponding bonding pads 23 through jumper wires
41 connected to the via holes 42,
[0129] for the second electrodes of the two second parts, in the
second part of a same second electrode unit 22, odd-numbered second
electrodes are connected to a same jumper wire 41, and
even-numbered second electrodes are connected to a same jumper wire
41, specifically, the fourth and the sixth second electrodes of the
first sensing electrode group 27 are connected to a same jumper
wire 41, the fourth and the sixth second electrodes of the second
sensing electrode group 27 are connected to a same jumper wire 41,
and each of second electrodes of the second electrode unit 22 in
the first sensing electrode group 27 is connected to a jumper wire
41 different from jumper wires 41 to which the second electrodes of
the second electrode unit 22 in the second sensing electrode group
27 are connected.
[0130] Reference is made to FIG. 4b, which is a schematic diagram
showing a topological structure of a single-layer multi-point
mutual capacitive touch screen according to another embodiment of
the disclosure. On the basis of FIG. 4a, in FIG. 4b, first lines 26
corresponding to the first electrodes of the two first parts are
connected to corresponding via holes 43 disposed at the first end,
and are connected to the corresponding bonding pads 23 through
jumper wires connected to the via holes 43, and second lines 25
corresponding to the second electrodes of the two first parts are
connected to corresponding via holes 43 disposed at the first end,
and are connected to the corresponding binding pads 23 through
jumper wires connected to the via holes 43.
[0131] For the first electrodes connected to corresponding bonding
pads 23 via jumper wires and via holes 43, first lines 25
corresponding to two opposite first electrodes of two first
electrode units in the first direction are connected to a
corresponding bonding pad 23 through a same jumper wire, where the
first lines are connected to the jumper wire through a via hole 43.
For the second electrodes connected to corresponding bonding pads
23 via jumper wires and via holes 43, odd-numbered second
electrodes are connected to a same jumper wire, and even-numbered
second electrodes are connected to a same jumper wire.
[0132] It is defined that one of the first electrode unit 21 and
the second electrode unit 22 is a first type of electrode unit, and
the other one is a second type of electrode unit. All lines of
electrodes of electrode units of the first type are connected to
corresponding bonding pads 23 along a direction opposite to the
second direction, and all lines of electrodes of electrode units of
the second type are connected to corresponding via holes 42
disposed at the second end of the m sensing electrode groups 27
along the second direction, and are connected to corresponding
bonding pads 23 through jumper wires 41 connected to the via holes
42, where the second end is arranged oppositely to the first end,
and jumper wires 41 are connected to respective bonding pads
23.
[0133] Reference is made to FIG. 4c, which is a schematic diagram
showing a topological structure of a single-layer multi-point
mutual capacitive touch screen according to another embodiment of
the disclosure. In FIG. 4c, the first electrode unit 21 is defined
as the first type of electrode unit, and the second electrode unit
22 is defined as the second type of electrode unit. Adjacent
sensing electrode groups 27 are arranged in mirror symmetry. All
lines of first electrode units 21 are connected to corresponding
bonding pads 23 along a direction opposite to the second direction.
All lines of second electrode units 22 are connected to
corresponding via holes 42 disposed at the second end along the
second direction, and are connected to corresponding bonding pads
23 through jumper wires 41 connected to the via holes 42.
[0134] Reference is made to FIG. 4d, which is a schematic diagram
showing a topological structure of a single-layer multi-point
mutual capacitive touch screen according to another embodiment of
the disclosure, lines of electrodes of electrode units of the first
type are connected to corresponding via holes 43 disposed at the
first end, and are connected to corresponding bonding pads 23
through jumper wires connected to the via holes 43.
[0135] In other embodiments, the first electrode unit 21 may be
defined as the second type of electrode unit, and the second
electrode unit 22 may be defined as the first type of electrode
unit.
[0136] In the embodiments of the disclosure, a case that the first
electrode unit 21 and the second electrode unit 22 of the first
sensing electrode group 27 are arranged in sequence along the first
direction is taken as an example. In other embodiments, the second
electrode unit 22 and the first electrode unit 21 of the first
sensing electrode group 27 may be arranged in sequence along the
first direction.
[0137] In addition, in other embodiments, the arrangement of the
sensing electrode groups 27 in each of FIGS. 4a to 4b is not
limited to the mirror symmetry, alternatively, the sensing
electrode groups 27 each having a same structure are arranged in an
array.
[0138] Reference is made to FIG. 5a, which is a schematic diagram
showing a specific structure of one of the multiple sensing
electrode groups 27 of the single-layer multi-point mutual
capacitive touch screen shown in FIG. 2 according to a preferable
embodiment of the disclosure. In the sensing electrode group shown
in FIG. 5a, n=3, k=2, that is, the first electrode unit 21 of the
sensing electrode group includes a first one of first electrodes
X1, a second first electrode X2 and a third first electrode X3, and
the second electrode unit 22 of the sensing electrode group
includes a first second electrode Y1 and a second one of second
electrodes Y2. Each first electrode includes a first comb electrode
x11 and a second comb electrode x12 which are partially arranged
opposite to each other in the first direction.
[0139] At a first end of a sensing electrode group, a first comb
electrode x11 of the first one of first electrodes X1 is flush with
a second comb electrode x12 of the first one of first electrodes
X1. At a second end of the sensing electrode group, a first comb
electrode x11 of an n-th first electrode is flush with a second
comb electrode x12 of the n-th first electrode.
[0140] Each of the first comb electrode x11 and the second comb
electrode x12 includes multiple first branch electrodes D1, where
the branch electrode D1 of the first comb electrode x11 extends in
the first direction, and the first branch electrode D1 of the
second comb electrode X12 extends in a direction opposite to the
first direction. The first comb electrode x11 is electrically
connected to the second comb electrode X12. For opposite portions
of the first comb electrode x11 and the second comb electrode x12
in the first direction, first branch electrodes D1 of the first
comb electrode x11 have a one-to-one correspondence with first
branch electrodes D1 of the second comb electrode x12.
[0141] In a same first electrode unit 21, the first comb electrode
x11 and the second comb electrode x12 of a first one of first
electrodes have different lengths in the second direction, the
first comb electrode x11 and the second comb electrode x12 of an
n-th first electrode have different lengths in the second
direction, and the first comb electrode x11 and the second comb
electrode x12 of each of the other first electrodes have a same
length in the second direction.
[0142] Each second electrode includes multiple second branch
electrodes D2, where the multiple second branch electrodes D2 are
arranged between the first comb electrodes x11 and the second comb
electrodes x12, and each of the multiple second branch electrodes
D2 includes a first branch element extending in a direction
opposite to the first direction and a second branch element
extending in the first direction, where the first branch element is
arranged between and coupled with two corresponding first branch
electrodes D1 of the first comb electrode x11, and the second
branch element is arranged between and coupled with two
corresponding first branch electrodes D1 of the second comb
electrode x12.
[0143] For the first one of first electrodes X1, in the second
direction, a first one of first branch electrodes D1 of the first
comb electrode x11 is electrically connected to a first one of
first branch electrodes D1 of the second comb electrode x12.
Alternatively, for the first one of first electrodes, in the second
direction, the first one of first branch electrodes D1 of the first
comb electrode x11 is integrated with the first one of first branch
electrodes D1 of the second comb electrode x12.
[0144] For an n-th first electrode, along the second direction, the
last one of first branch electrodes D1 of the first comb electrode
x11 is electrically connected to the last one of first branch
electrodes D1 of the second comb electrode x12. For a p-th first
electrode, one of the multiple first branch electrodes D1 of the
first comb electrode x11 is electrically connected to one of the
multiple first branch electrode D1 of the second comb electrode
x12, and the two electrically connected first branch electrodes D1
are opposite in the first direction, where p is a positive integer
greater than 1 and smaller than n. In the arrangement shown in
FIGS. 5a, n=3, and p=2.
[0145] Reference is made to FIG. 6a, which is a schematic diagram
showing a specific structure of one of the multiple sensing
electrode groups of the single-layer multi-point mutual capacitive
touch screen shown in FIG. 3 according to a preferable embodiment
of the disclosure. In FIG. 6a, similarly, n=3, and k=2. The first
comb electrode x11 and the second comb electrode x12 of a first one
of first electrodes X1 of the sensing electrode group are connected
in a same manner as the connection shown in FIG. 5a. For a q-th
first electrode, one of the multiple first branch electrode D1 of
the first comb electrode x11 is electrically connected to one of
the multiple first branch electrode D1 of the second comb electrode
x12, and the two electrically connected first branch electrodes D1
are staggered in the first direction, that is, the two electrically
connected first branch electrodes D1 are not opposite to each other
in the first direction, such that two adjacent second electrodes in
a same second electrode unit are partially arranged opposite to
each other in the first direction, where q is a positive integer
greater than 1 and smaller than n. In the single-layer multi-point
mutual capacitive touch screen shown in FIG. 6a, p is equal to 2 or
3.
[0146] For any one of the multiple sensing electrode groups 27, a
direction of a connection line between the first electrode unit 21
and the second electrode unit 22 is the first direction or the
direction opposite to the first direction.
[0147] Reference is made to FIG. 5b, which is a schematic diagram
showing a specific structure of the multiple sensing electrode
groups of the single-layer multi-point mutual capacitive touch
screen shown in FIG. 2 according to a preferable embodiment. In
FIG. 5b, two adjacent sensing electrode groups 27 are arranged in
mirror symmetry in the first direction. Reference is made to FIG.
5c, which is a schematic diagram showing a structure of multiple
sensing electrode groups of the single-layer multi-point mutual
capacitive touch screen according to another preferable embodiment
of the disclosure. For any one of the multiple sensing electrode
groups 27, a direction of a connection line between the first
electrode unit 21 and the second electrode unit 22 is the first
direction. The single-layer multi-point mutual capacitive touch
screens with sensing electrode groups 27 shown in FIG. 5b and FIG.
5c are on the basis of the structure shown in FIG. 5a.
[0148] Reference is made to FIG. 6b, which is a schematic diagram
showing a specific structure of the multiple sensing electrode
groups of the single-layer multi-point mutual capacitive touch
screen shown in FIG. 3 according to a preferable embodiment of the
disclosure. In FIG. 6b, two adjacent sensing electrode groups 27
are arranged in mirror symmetry in the first direction. Reference
is made to FIG. 6c, which is a schematic diagram showing a
structure of multiple sensing electrode groups of a single-layer
multi-point mutual capacitive touch screen according to another
preferable embodiment of the disclosure. In FIG. 6c, the multiple
sensing electrode groups 27 have a same structure and are arranged
in an array. The single-layer multi-point mutual capacitive touch
screens shown in FIG. 6b and FIG. 6c are on the basis of the
structure shown in FIG. 6a.
[0149] Hereinafter, the case that two adjacent sensing electrode
groups 27 are arranged in mirror symmetry is taken as an example in
conjunction with specific data to illustrate that, with the
technical solutions of the embodiments of the disclosure, the
number of lines can be greatly decreased thereby decreasing the
number of bonding pads 23 and reducing the width of the line dead
region, thus the touch accuracy is improved and the cost is
reduced. A 5-inch touch screen is taken as an example, and
generally, the touch screen is arranged with a length of 8 pitches
in the first direction and a length of 15 pitches in the second
direction.
[0150] It should be noted that, the first electrode and the second
electrode in each of the multiple sensing electrode groups 27 are
not limited to the specific structures shown in FIGS. 5a, 5b, 5c,
6a, 6b, and 6c, and may have specific structures of other suitable
types.
[0151] FIG. 7 is a schematic diagram showing a topological
structure of a conventional single-layer multi-point mutual
capacitive touch screen. If a single-layer multi-point mutual
capacitive touch screen is arranged as shown in FIG. 7, each of
sensing electrode groups includes 1 first electrode 71 and 15
second electrodes 72. The first electrode 71 has a length of 15
pitches, and the second electrode 72 has a length of 1 pitch. In
this case, for each of the sensing electrode groups, 16 lines (1
first line and 15 second lines) are required, and for eight sensing
electrode groups, a total of 16*8=128 lines are required. 30 second
lines are arranged in the line dead region between two adjacent
sensing electrode groups. 15 capacitive sensing nodes are formed in
each sensing electrode group, and a total of 15*8=120 capacitive
sensing nodes are formed in 8 sensing electrode groups.
[0152] FIG. 8 is a schematic diagram showing a topological
structure of another conventional single-layer multi-point mutual
capacitive touch screen. If a single-layer multi-point mutual
capacitive touch screen is arranged as shown in FIG. 8, each of
sensing electrode groups includes 8 first electrodes 81 and 8
second electrode 82. In a same sensing electrode group, it may be
arranged that in the Y direction, a first one of first electrodes
81 has a length of 1 pitch, each of the other first electrodes 81
has a length of 2 pitches, a last second electrode 82 has a length
of 1 pitch, and each of the other second electrodes 82 has a length
of 1 pitch. In this case, for each of the sensing electrode groups,
16 lines (8 first lines and 8 second lines) are required, and 15
capacitive sensing nodes are formed. In the arrangement shown in
FIG. 8, similarly, there are 16*8=128 lines and 15*8=120 capacitive
sensing nodes. 16 second lines are arranged in the line dead region
between two adjacent sensing electrode groups.
[0153] FIG. 9 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure. If a
single-layer multi-point mutual capacitive touch screen is arranged
as shown in FIG. 9, a first electrode unit 21 and a second
electrode unit 22 of a sensing electrode group 27 has a same
structure and arrangement as the first electrode unit 21 and the
second electrode unit 22 of the sensing electrode group 27 as shown
in FIG. 2. The single-layer multi-point mutual capacitive touch
screen as shown in FIG. 9 differs from single-layer multi-point
mutual capacitive touch screen as shown in FIG. 2 in that the
single-layer multi-point mutual capacitive touch screen as shown in
FIG. 9 has four more sensing electrode groups and has 8 sensing
electrode groups 27 in the first direction. In the single-layer
multi-point mutual capacitive touch screen as shown in FIG. 9,
there are 13*8=104 lines and 18*8=144 capacitive sensing nodes, and
16 second lines or 14 first lines are arranged in the line dead
region between two adjacent sensing electrode groups 27. Therefore,
as compared to the arrangements shown in FIG. 7 and FIG. 8, the
number of lines is decreased (thus the number of bonding pads is
decreased), the number of lines in the line dead region is
decreased and the number of capacitive sensing nodes is increased.
Therefore, the touch accuracy is efficiently improved and the
fabrication cost is reduced. Furthermore, the width of the line
dead region is reduced which can further improve the touch
accuracy.
[0154] FIG. 10 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure. If a
single-layer multi-point mutual capacitive touch screen is arranged
as shown in FIG. 10, a first electrode unit 21 and a second
electrode unit 22 of a sensing electrode group 27 has a same
structure and arrangement as the first electrode unit 21 and the
second electrode unit 22 of the sensing electrode group 27 as shown
in FIG. 9. The single-layer multi-point mutual capacitive touch
screen as shown in FIG. 10 differs from single-layer multi-point
mutual capacitive touch screen as shown in FIG. 9 in that in each
of the sensing electrode groups 27, along the second direction,
first lines corresponding to first to third first electrodes and
second lines corresponding to first to third second electrodes are
connected to corresponding bonding pads along a direction opposite
to the second direction, and first lines corresponding to the other
first electrodes and second lines corresponding to the other second
electrodes are connected to jumper wires through via holes 42
disposed at a second end along the second direction, so as to be
connected to the corresponding bonding pads through jumper wires
41.
[0155] In FIG. 10, the number of lines is the same as the number of
lines shown in FIG. 9. Compared with the arrangement as shown in
FIG. 9, in FIG. 10 lines in the line dead region extends in two
different directions thus the width of the line dead region is
further reduced. Furthermore, with above arrangement of the jumper
wires in which first lines are reused, and jumper wires are shared,
the number of lines and the number of bonding pads can be further
decreased, and the cost can be further reduced and the touch
accuracy can be further improved.
[0156] FIG. 11 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure. If a
single-layer multi-point mutual capacitive touch screen is arranged
as shown in FIG. 11, a first electrode unit 21 and a second
electrode unit 22 of a sensing electrode group 27 has a same
structure and arrangement as the first electrode unit 21 and the
second electrode unit 22 of the sensing electrode group 27 as shown
in FIG. 3. The single-layer multi-point mutual capacitive touch
screen as shown in FIG. 11 differs from single-layer multi-point
mutual capacitive touch screen as shown in FIG. 3 in that the
single-layer multi-point mutual capacitive touch screen as shown in
FIG. 9 has four more sensing electrode groups and has 8 sensing
electrode groups 27 in the first direction. There are 12*8=96 lines
and 20*8=160 capacitive sensing nodes arranged in the single-layer
multi-point mutual capacitive touch screen as shown in FIG. 11, 12
lines are arranged in the line dead region between two adjacent
sensing electrode groups 27. Therefore, as compared to the
arrangements shown in FIG. 7 and FIG. 8, similarly, the number of
lines is decreased, the width of the line dead region is reduced,
thus the touch accuracy is efficiently improved and the fabrication
cost is reduced.
[0157] FIG. 12 is a schematic diagram showing a topological
structure of a single-layer multi-point mutual capacitive touch
screen according to another embodiment of the disclosure. If a
single-layer multi-point mutual capacitive touch screen is arranged
as shown in FIG. 12, a first electrode unit 21 and a second
electrode unit 22 of a sensing electrode group 27 has a same
structure and arrangement as the first electrode unit 21 and the
second electrode unit 22 of the sensing electrode group 27 as shown
in FIG. 11. The single-layer multi-point mutual capacitive touch
screen as shown in FIG. 12 differs from single-layer multi-point
mutual capacitive touch screen as shown in FIG. 11 in that in each
sensing electrode group 27, in the second direction, first lines 26
corresponding to first and second first electrodes and second lines
25 corresponding to first to third second electrodes are connected
to corresponding bonding pads 23 along a direction opposite to the
second direction, and first lines 26 corresponding to the other
first electrodes and second lines 25 corresponding to the other
second electrodes are connected, along the second direction, to
corresponding jumper wires via holes 42 disposed at the second end,
so as to be connected to the corresponding bonding pads.
[0158] In FIG. 12, the number of lines is the same as the number of
lines shown in FIG. 11. Compared with the arrangement as shown in
FIG. 11, in FIG. 12, lines in the line dead region extends in two
different directions thus the width of the line dead region is
further reduced. Furthermore, with above arrangement of the jumper
wires in which first lines are reused, and jumper wires are shared,
the number of lines and the number of bonding pads can be further
decreased, and the cost can be further reduced and the touch
accuracy can be further improved. bonding pad
[0159] It should be noted that, the single-layer multi-point mutual
capacitive touch screen is a mutual capacitive touch screen with
first electrodes and second electrodes formed from a single layer
of electrode, which can achieve multi-point touch.
[0160] As can be seen from the above description, in the
single-layer multi-point mutual capacitive touch screen, the number
of lines and the number of bonding pads are decreased, and the
width of the line dead region is reduced, while the touch accuracy
is improved and the fabrication cost is reduced.
[0161] An electronic apparatus is further provided according to the
embodiment of the disclosure. Reference is made to FIG. 13, which
is a schematic structural diagram of an electronic apparatus 131
according to an embodiment of the disclosure. The electronic
apparatus 131 includes a single-layer multi-point mutual capacitive
touch screen 132, where the single-layer multi-point mutual
capacitive touch screen 132 may be the single-layer multi-point
mutual capacitive touch screen according to any one of the above
embodiments. The electronic apparatus 131 may be a cell phone, a
tablet computer, a navigation device, etc.
[0162] In addition, the electronic apparatus 131 further includes a
flexible printed circuit board (FPC) and a touch chip (not shown in
the drawings), where the touch chip is electrically connected to
the single-layer multi-point mutual capacitive touch screen 132
though the FPC, and configured to provide a drive signal to the
single-layer multi-point mutual capacitive touch screen 132 and
receive a sensing signal from the single-layer multi-point mutual
capacitive touch screen 132 thereby achieving the touch detection
function.
[0163] Since the electronic apparatus 131 is provided with the
single-layer multi-point mutual capacitive touch screen according
to any one of the above embodiments, the electronic apparatus 131
has a high touch accuracy and a low fabrication cost. Furthermore,
since the number of the bonding pads 23 can be decreased, a width
of the FPC connected to the bonding pads 23 can be reduced
accordingly, thus the cost can be further reduced.
[0164] The connection relationship between the touch chip of the
electronic apparatus 131 and the first electrodes and second
electrodes of the single-layer multi-point mutual capacitive touch
screen according to the disclosure is described below in
conjunction with the schematic diagram of the single-layer
multi-point mutual capacitive touch screen according to any one of
the above embodiments.
[0165] The touch chip includes multiple pins which are configured
to transmit a signal between the touch chip and the single-layer
multi-point mutual capacitive touch screen. For each of the m
sensing electrode groups 27,
[0166] the n first electrodes are connected to respective pins of
the touch chip; and
[0167] along the second direction, odd-numbered second electrodes
of the second electrode unit 22 are connected to a same pin of the
touch chip, and even-numbered second electrodes of the second
electrode unit 22 are connected to a same pin of the touch chip,
where the odd-numbered second electrodes and the even-numbered
second electrodes are connected to different pins.
[0168] For different sensing electrode groups,
[0169] along the second direction, the first electrodes of first
electrode units 21 with respect to a same position in an order of
first electrodes are connected to a same pin of the touch chip, and
second electrodes of second electrode units 22 with respect to a
same position in the order of second electrodes are connected to
different pins of the touch chip; and
[0170] second electrodes of different sensing electrode groups 27
are connected to different pins of the touch chip.
[0171] With the above descriptions of the disclosed embodiments,
those skilled in the art may achieve or use the present disclosure.
Various modifications to the embodiments are apparent for those
skilled in the art. The general principle defined herein may be
implemented in other embodiments without departing from the spirit
or scope of the disclosure. Therefore, the present disclosure is
not limited to the embodiments disclosed herein, but confirm to the
widest scope in consistent with the principle and the novel
features disclosed herein.
* * * * *